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Methods Updates
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We have made changes to procedures under Clean Water Act compliance monitoring programs. The final rule introduces several new analytical methods for compliance monitoring and withdraws other methods. There are also new sample collection procedures, general analytical requirements for multi-analyte methods, and method flexibility requirements for Clean Water Act programs.
The March 12, 2007 final rule revises the list of approved analysis and sampling procedures in wastewater regulations that we proposed for public comment in April 2004.
- Frequent Questions (May 2007)
- Fact Sheet (July 2006) | Print Version of the Fact Sheet (PDF) (38 K, 2 pages)
- Methods Update Rule (March 12, 2007) | Print Version (PDF) (51 pages, 2.3 MB)
- Approved Methods
We also issued new methods that use culture-based approaches to detect enterococci and Escherichia coli (E. coli) in wastewater. Additional tests will also identify Salmonella and fecal coliform bacteria in sewage sludge.
- Fact Sheet | Print Version (PDF) (1 page, 23 K)
- Final Rule (Federal Register Notice) | Print Version (PDF) (15 pages, 556 K) (March 26, 2007)
Note: EPA no longer updates this information, but it may be useful as a reference or resource.
Archive
2005 Notice of Data Availability
We solicited comment on information regarding the proposed approvals and withdrawals of analytical methods for wastewater, three updated versions of analytical methods proposed for approval, and evaluations of immunoassay test kits for atrazine.
- Fact sheet about the data and how to comment (February 2005)
- Notice published in the Federal Register (February 16, 2005)
2004 Proposed rule
- Fact sheet on the proposed rule (December 2003)
- Proposed rule published in the Federal Register | Print version (PDF) (62 pages, 835 K; April 6, 2004)